Improvement in student-lamps



S. G. CATLIN. Student-Lamp.

Patented Sept. 24, 1878.

N. PETERS, PHOTO-LHHOGRAPHER, WASHINGTON D C UNITED STATES PATENTOEEIoE.

SETH O. CATLIN, OF BROOKLYN, NEW YORK, ASSIGNOR TO EMMA F. CATLIN,

OF SAME PLACE.

STUDENT- LAM PS.

Specification forming part ofLetters Patent No. 208,293, (latedSeptember 24, 1878; application filed J annary 24, 1878.

To all whom it may concern:

Be it known that I, SETH O. CATLIN, of Brooklyn, in the county of Kingsand State of New York, have invented an Improvement in Student-Lamps, ofwhich the following is a specification:

In fountain or student lamps difficulty arises in ascertaining when thefountain is full, or when it has become empty or nearly so. I make saidfountain of glass,whereby to allow the height of oil to be observed; butto make the fountain agreeable to the eye, and to prevent the oilappearing when the fountain is inverted into the holder, I make the topof such foimtain of opalescent or colored glass, which produces a veryhandsome finish and shields the fountain. I also combine with the valvea diving-bell float, that acts as the oil rises in filling and closesthe valve; but the same ceases tobe a float when the fountain isinverted to place. The thimble forming the valve-neck is screwed to theglass fountain, and the same is perforated for the escape of air, andthe drip-cup of the burner is fastened on by springs to a centralstandard that passes into the air-tube, and thereby allows the drip-cupto be drawn downward and detached without unscrewing. This facilitateslighting in chandelier-lamps.

In the drawings, Figure l is an elevation of the lamp with the fountainin section. Fig. 2 is an inverted plan of the fountain, and Fig. 3 is anelevation of the drip-cup and holder.

The burner a. is provided with the usual Argand wick and centralair-tube and the dripcup 0, instead of being screwed on, is connected tothe burner by springs e, and is provided with a central standard, d,which springs are compressed by being thrust into the air-tube of theArgand burner, and sustain such drip-cup by friction. The drip-cup canbe detached for cleaning or lighting by drawing the parts downwardly.

I prefer and use a tubular end to the standard d, so as to insert amatch or taper to light the lamp as the drip-cup is returned to place.

The tube f passes to the metallic reservoir g, as usual, and thisreservoir receives the glass fountain h. I prefer to make this fountainof cle ar glass within the reservoir g, and the upper part, h, opaque,and either white or colored, for the purposes before named.

The glass neck i of the fountain his made with a screw-thread, toreceive the thimble I, that is also made with a thread, and preferablyof sheet metal. The opening and valveseat are in the middle of thisthimble. There are guides at for the valve-stem 0 at both sides of thevalve 1, and such valve is either operated by a spring, as in Fig. 4, orpro vided with the diving-bell float s, the open end of which isdownward as the lamp-fountain is being filled, and hence the confinedair causes it and the valve to float and close the inlet-orifice andindicate the proper supply. A vent-hole is made at t for the escape ofair from the fountain.

When the fountain is inverted the air in the float escapes, and the sameceases to be a oat.

There is a groove in the glass of the fountain, as at o, and a pin, a,in the metal reservoir g, forming a bayonet-lock, to hold the fountainin place.

There may be a spring around the stem of the float-valve, (shown in Fig.1,) to bear or partially bear the weight of the valve.

There is a cross-piece, 0, upon the valvestem 0, that forms a rest forthe spout of the oil-can, and when the valve does not open by gravitywhen the fountain is invertedsuch valve is opened by pressure from thespout of the can.

I do not claim an inverted foimtain pro vided with a pin entering agroove or slot in the reservoir, as these have been used; but in my lampthe locking devices are covered up, and do not disfigure the reservoiror holder, and thegroove is in a position around the fountain where itis easily made.

I am aware that the fountain of a studentlamp has been made of glass,with a top cover of sheet metal and with a screw-neck andscrew-thimble/for the valve.

I claim as my invention- 1. The combination, With the drip-cup in astudent-lamp, of a central standard and springs, substantially as setforth.

2. In the student-lamp, a glass fountain the i tube and the dripcup, ofsprings connecting the drip-cup removably to the Argand burner,substantially as specified.

6. In a student-lamp, a bayonet-groove in the material of the fountainaround the cylindrical portion thereof, and a pin proj eating inwardlyfrom the reservoir or holder, substantially as set forth.

Signed by me this 21st day of January, A.

SETH O. GATLIN. Witnesses:

J. H. MoMURRAY, O. H. JONES.

